Cytherellidae

Cytherella sp., copyright Brandão, Simone Nunes & Yasuhara Moriaki.

Belongs within: Platycopina.

The Cytherellidae are a group of ostracods known from the Jurassic to the present, characterised by carapace valves with muscle scars arranged in two curved parallel rows (Benson et al. 1961).

Characters (from Benson et al. 1961): Carapace mostly oval in side view, dorsal margin convex, anterior and posterior ends generally subequal in height; right valve typically larger than left. Marginal pore canals absent or represented by short simple canals of normal type; contact furrow entire, hinge undifferentiated; selvage of smaller valve forming valve edge; adductor-muscle field composed of two curved parallel rows, each with five to nine elongated spots. Dimorphic, with brood section in posterior part of carapace. Antennae biramous, equal, the basal part biarticulate and geniculate, with numerous setae attached to both margins. Antennules very large and strong, multiarticulate, geniculate at the base, with short spines. Mandibles small and feeble, with a large palp. Three pairs of thoracic limbs, all maxilliform. Mandibular palps and maxillulae provided with pair of combs with large bristles attached to inner surfaces. Maxillulae and third post-oral limbs provided with large branchial plates; fourth post-oral limb rudimentary in female, evolute and prehensile in male. Furcal rami small and narrow, distinctly separate, spinose at apices.

<==Cytherellidae
    |--Ankumia Van Veen 1932 BB61
    |    `--*A. bosqueti Van Veen 1932 BB61
    |--Platella Coryell & Fields 1937 BB61
    |    `--*P. gatunensis Coryell & Fields 1937 BB61
    |--Cytherelloidea Alexander 1929 S-VC91 [=Cytherelloides (l. c.) M61]
    |    |--*C. williamsoniana (Jones 1849) [=Cytherella williamsoniana] BB61
    |    |--C. alabamensis [=Cytherella (Cytherelloidea) alabamensis] BB61
    |    |--C. granulosa (Jones 1849) A03
    |    |--C. kallakkudiensis G12
    |    |--C. ouachitensis [=Cytherella (Cytherelloidea) ouachitensis] BB61
    |    |--C. paratewari Swain & Gilby 1974 S-VC91
    |    `--C. praecipua van den Bold 1963 S-VC91
    `--Cytherella Jones 1849 A03 [incl. Morrowina Loetterle 1937 BB61]
         |  i. s.: C. banda B61
         |         C. bensoni Dingle 1984 G12
         |         C. elongata RR03
         |         C. jenensis Kozur 1968 WSB93
         |         C. kallakkudiensis Jain 1976 G12
         |         C. ovularia Swain 1967 S-VC91
         |         C. parallela RR03
         |         C. parapunctata Swain 1967 S-VC91
         |         C. savagei Geis 1932 CB86
         |--C. (Cytherella) BB61
         |    |--*C. (C.) ovata (Roemer 1840) [=Cytherina ovata] BB61
         |    `--C. (C.) abyssorum BB61
         `--C. (Staringia Van Veen 1936) [incl. Terquemia Van Veen 1932 non Tate 1868] BB61
              `--C. (*S.) falcoburgensis [=Terquemia falcoburgensis] BB61

*Type species of generic name indicated

REFERENCES

[A03] Adamczak, F. J. 2003. The platycopine dynasty. 2. Family Cavellinidae Egorov, 1950. Authentic platycopines. Neues Jahrbuch für Geologie und Paläontologie—Abhandlungen 229 (3): 375–391.

[B61] Benson, R. H. 1961. Ecology of ostracode assemblages. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt Q. Arthropoda 3: Crustacea: Ostracoda pp. Q56–Q63. Geological Society of America and University of Kansas Press.

[BB61] Benson, R. H., J. M. Berdan, W. A. van den Bold, T. Hanai, I. Hessland, H. V. Howe, R. V. Kesling, S. A. Levinson, R. A. Reyment, R. C. Moore, H. W. Scott, R. H. Shaver, I. G. Sohn, L. E. Stover, F. M. Swain & P. C. Sylvester-Bradley. 1961. Systematic descriptions. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt Q. Arthropoda 3: Crustacea: Ostracoda pp. Q99–Q421. Geological Society of America and University of Kansas Press.

[CB86] Chen D.-Q. & Bao H. 1986. Lower Permian ostracodes from the Chihsia Formation of Jurong and Longtan, Jiangsu Province. Acta Micropalaeontologica Sinica 3 (2): 107–132.

[G12] Guzel, M. 2012. Jurassic and Early Cretaceous ostracods from Western Australia: what they reveal about evolution of the Indian Ocean. In: Talent, J. A. (ed.) Earth and Life: Global biodiversity, extinction intervals and biogeographic perturbations through time pp. 849–882. Springer.

[M61] Moore, R. C. 1961. Supplement—USSR treatise on Ostracoda. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt Q. Arthropoda 3: Crustacea: Ostracoda pp. Q422–Q429. Geological Society of America and University of Kansas Press.

[RR03] Rossi, A., J. Rey, B. Andreu & K. Taj-Eddine. 2003. Apport des ostracodes à l’interprétation séquentielle du Crétacé inférieur (Berriasien – Valanginien) du bassin d’Essaouira-Agadir (Maroc). Comptes Rendus Palevol 2: 133–141.

[S-VC91] Segura-Vernis, L. R., & A. L. Carreño. 1991. Foraminíferos y ostrácodos de la Laguna de La Paz, Baja California Sur, México. Inv. Mar. CICIMAR 6 (1): 195–224.

[WSB93] Whatley, R. C., D. J. Siveter & I. D. Boomer. 1993. Arthropoda (Crustacea: Ostracoda). In: Benton, M. J. (ed.) The Fossil Record 2 pp. 343–356. Chapman & Hall: London.